Carrying Out A Leak Test - Buderus Logano plus GB312 Installation And Maintenance Instructions Manual

9
Inspection and maintenance
9.3.2

Carrying out a leak test

B Close the main shut-off valve or gas tap.
B Undo the pressure test nipple plug by two revolutions.
B Push the test hose of the U-pipe pressure gauge onto
the pressure test nipple.
B Open the main shut-off valve or gas tap, then note and
record the pressure.
B Close the main shut-off valve or gas tap and check the
pressure again a minute later.
B Calculate the pressure drop per minute from the
differential.
By means of the determined pressure drop per minute
and the test volume (V ), check in the following diagram
test
( Fig. 51, page 47) whether the gas train is still useable.
Fig. 48 Checking the internal tightness (boiler size 90/
120 kW)
1 Pressure test nipple
46
Fig. 49 Checking the internal tightness (boiler size
160 kW)
1 Pressure test nipple
Fig. 50 Checking the internal tightness (boiler sizes
200 to 280 kW)
1 Pressure test nipple
Logano plus GB312 - Subject to technical modifications.